stop google chrome running as background process in windows

Even though, you have not opened chrome browser, it runs in your background as a process and takes huge memory size next to Firefox. You can view this in task manager.

Also you can see that the chrome.exe running as a startup process which you have not set. If you change settings in start up process, it will automatically adds chrome.exe as a startup process by itself and runs in the background when you start your system.